Interactive Maps

The Lower Potomac

The Potomac Estuary

Mount Vernon to Reagan Airport

Mall Area

Georgetown to Great Falls

Potomac Piedmont

Upper Potomac

The North Branch

Boat Ramps

Monitoring Sites

Bridges and Ferries

Cruises and Charters

Search Potomac Sites

Waffle Rock

Historic Site

Unusual rock formation that was discovered during construction of the Jennings Randolph Reservoir.

Contact Information


Elk Garden WV 26717

Website